#include<stdio.h>
#include<stdlib.h>
#include<stdbool.h>

typedef struct LNode{
    int data;
    struct LNode *next;
}*LinkList, LNode;

int main(){
    LNode *temp1;
    LNode *temp2;
    temp1->data = 20;
    temp1->next = NULL;
    printf("%d\n", temp1->data);
    printf("%d\n", sizeof(temp2));
    return 0;
}